The Late Ordovician in Paleozoic spanned from
488 to
443.7 millon years ago. The explanation in brackets is the ages they lived in extinct species. Note that
Mya is million years ago. For example, "48.6~40.4 Mya" shows a range between 48.6 and 40.4 million years ago. The italic and bold figures, e.g.
488, show out of the range. The time range is shown in the
Geological Time Table. The followings are a part of the Evolutionary Tree.
Ordovician,
Early Ordovician,
Middle Ordovician, Late Ordovician
The right map is the continents at Middle Ordovician provided by
C. R. Scotese PALEOMAP Project.
| 460.9 Mya |
| 460.9~457.5 Mya |  | Sea bud | Ascocystites |
 | Sea lily | Caleidocrinus |
 | Trilobite | Reacalymene |
| 460.9~449 Mya |  | Sea lily | Diabolocrinus , Amygdalocystites , Sinclairocystis , Comarocystites , Platycystites |
 | Trilobite | Onnicalymene |
| 460.9~428.2 Mya |  | Trilobite | Calymenella (Great Dying①) |
| 460.9~425.4 Mya |  | Trilobite | Hadromeros |
| 460.9~260.5 Mya |  | Gastropoda | Platyceras (Great Dying①②) |
| 460.9~0 Mya | | First snail fossil |
 | Snail | (Pagoda shells) (Great Dying①②③④⑤) |
 | Bivalve | (Astarte) (Great Dying①②③④⑤) |
| 460.5 Mya |
| 460.5~450 Mya |  | Sea lily | Archaeocrinus , Achradocystites |
 | Cephalopod | Gonioceras |
 | Jawless fish | Astraspis |
| 460.5~449.5 Mya |  | Echinoderm | Myeinocystites |
 | Edrioasteroid | Edrioaster , Isorophusella , Cyathocystis , Foerstediscus , Edriophus , Thresherodiscus , Cryptogoleus , Cystaster |
 | Trilobite | Onnia |
 | Jawless fish | Eriptychius |
| 460.5~449 Mya |  | Edrioasteroid | Astrocystites |
| 460.5~445.6 Mya |  | Edrioasteroid | Carneyella |
| 460.5~443.7 Mya |  | Sponge | Brachiospongia |
 | Echinoderm | Iowacystis |
 | Edrioasteroid | Isorophus , Streptaster |
 | Brittle star | Lanthanaster |
| First sea scorpion fossil |
 | Sea scorpion | Megalograptus |
| 460.5~428.2 Mya |  | Brittle star | Stenaster (Great Dying①) |
| 460.5~418.1 Mya |  | Sea lily | Protaxocrinus (Great Dying①) |
| 460.5~376.1 Mya |  | Coral | Heliolites (Great Dying①) |
| 460.5~360.7 Mya |  | Edrioasteroid | Agelacrinites (Great Dying①) |
| 460.5~353.8 Mya |  | Lamp shell | Philhedra (Great Dying①②) |
 | Ringed worm | Arabellites (Great Dying①②), Eunicites (Great Dying①②) |
| 460.5~345.3 Mya |  | Cephalopod | Cyrtoceras (Great Dying①②) |
 | Trilobite | Phacops (Great Dying①②) |
| 460.5~290 Mya |  | Coral | Syringopora (Great Dying①②) |
| 460.5~199.6 Mya |  | Gastropoda | Loxonema (Great Dying①②③) |
| 460.5~145.5 Mya |  | Sponge | Chaetetes (Great Dying①②③④) |
| 457.5 Mya |
| 457.5~409.1 Mya |  | Brittle star | Protaster (Great Dying①) |
| 457.5~391.9 Mya |  | Trilobite | Gravicalymene (Great Dying①) |
| 457.5~376.1 Mya |  | Coral | Columnaria (Great Dying①) |
| 457.5~0 Mya |  | Bivalve | (Ark clams) (Great Dying①②③④⑤) |
| 456.1 Mya |
| 456.1~428.2 Mya |  | Coral | Grewingkia (Great Dying①) |
| 453 Mya |
| 453~359 Mya |  | Jawless fish | Furcacauda (Great Dying①) |
| 452 Mya |
| 452~383.7 Mya |  | Trilobite | Cheirurus (Great Dying①) |
| 450 Mya |
| 450~443 Mya | | First event of Major extinction (Great Dying①) |
| 450~418.1 Mya |  | Trilobite | Papillicalymene (Great Dying①) |
| 450~409.1 Mya |  | Edrioasteroid | Rhenopyrgus (Great Dying①) |
| 449.5 Mya |
| 449.5~391.9 Mya |  | Edrioasteroid | Pyrgocystis (Great Dying①) |
 | Brittle star | Euzonosoma (Great Dying①) |
| 449 Mya |
| 449~443.7 Mya |  | Chordata | Promissum |
 | Trilobite | Soomaspis |
| 449~418.1 Mya |  | Sea scorpion | Onychopterella (Great Dying①) |
| 449~388.1 Mya |  | Brittle star | Encrinaster (Great Dying①) |
| 445.6 Mya |
| 445.6~388.1 Mya |  | Lamp shell | Eospirifer (Great Dying①) |
| 445.6~359.2 Mya |  | Sponge | Astylospongia (Great Dying①) |